| Clue | Source | Date |
|---|---|---|
| Express Amtrak options | New York Times | 10 Aug 2025 |
| Express options since 2000 | New York Times | 08 Jun 2024 |
| Northeast Corridor lines | ||
| High-speed Amtrak trains | LA Times Daily | 20 Nov 2023 |
| Amtrak speedsters | LA Times Daily | 17 Oct 2020 |
| Amtrak speedsters | The Washington Post | 17 Oct 2020 |
| Amtrak speedsters | ||
| Amtrak express trains | ||
| Some high-speed trains | ||
| Some express trains |